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64-bit _llseek() support for the future.

This commit is contained in:
Ryan C. Gordon 2002-06-06 06:09:19 +00:00
parent 6fd0450c96
commit 81a9df44bc
1 changed files with 25 additions and 4 deletions
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25
platform/posix.c
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@ -43,6 +43,10 @@
#include <fcntl.h> #include <fcntl.h>
#include <assert.h> #include <assert.h>
#ifdef PHYSFS_HAVE_LLSEEK
#include <linux/unistd.h>
#endif
#define __PHYSICSFS_INTERNAL__ #define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h" #include "physfs_internal.h"
@ -429,8 +433,15 @@ int __PHYSFS_platformSeek(void *opaque, PHYSFS_uint64 pos)
{ {
int fd = *((int *) opaque); int fd = *((int *) opaque);
/* !!! FIXME: Use llseek where available. */ #ifdef PHYSFS_HAVE_LLSEEK
unsigned long offset_high = ((pos >> 32) & 0xFFFFFFFF);
unsigned long offset_low = (pos & 0xFFFFFFFF);
loff_t retoffset;
int rc = llseek(fd, offset_high, offset_low, &retoffset, SEEK_SET);
BAIL_IF_MACRO(rc == -1, strerror(errno), 0);
#else
BAIL_IF_MACRO(lseek(fd, (int) pos, SEEK_SET) == -1, strerror(errno), 0); BAIL_IF_MACRO(lseek(fd, (int) pos, SEEK_SET) == -1, strerror(errno), 0);
#endif
return(1); return(1);
} /* __PHYSFS_platformSeek */ } /* __PHYSFS_platformSeek */
@ -439,8 +450,18 @@ int __PHYSFS_platformSeek(void *opaque, PHYSFS_uint64 pos)
PHYSFS_sint64 __PHYSFS_platformTell(void *opaque) PHYSFS_sint64 __PHYSFS_platformTell(void *opaque)
{ {
int fd = *((int *) opaque); int fd = *((int *) opaque);
PHYSFS_sint64 retval = lseek(fd, 0, SEEK_CUR); PHYSFS_sint64 retval;
#ifdef PHYSFS_HAVE_LLSEEK
loff_t retoffset;
int rc = llseek(fd, 0, &retoffset, SEEK_CUR);
BAIL_IF_MACRO(rc == -1, strerror(errno), -1);
retval = (PHYSFS_sint64) retoffset;
#else
retval = (PHYSFS_sint64) lseek(fd, 0, SEEK_CUR);
BAIL_IF_MACRO(retval == -1, strerror(errno), -1); BAIL_IF_MACRO(retval == -1, strerror(errno), -1);
#endif
return(retval); return(retval);
} /* __PHYSFS_platformTell */ } /* __PHYSFS_platformTell */